Speedometer



Nov. 6, 192s. 1,699355 J. ZUBATY SPEEDOMBTER Filed Feb. l, 1928 gwntov A/dfe/ Z1@ Patented Nov. 6, 1928.

lUiNl'IEl) STATES l, y 1,690,355 PATENT OFFICE.

.msnm-:I ZUBATY, or :rLINn MICHIGAN, AssIGNoR re A C spaar: PLUG contraria',

or FLIN'I, MICHIGAN, `A CoMrAnY or MICHIGAN.

j Spanner/DETER.

Application Atiled February `My invention relates to an improvement in the construction .of speedometers of the type in which the speed is indicated by the :rotation Aof a speed cup. The speed cup usually has secured to i't ahair spring which acts to provide the proper resistance against the rotation of the speed cup so that the latter will always indicate the eorrectlspeed, and also to return the speed cup to zero position when the vehicle has stopped.

The object vor' my invention is :to provide a simple device which is easily secured in place without the use of any separate fastening means, and which will serve .as an adjustable abutment for one end off the hair spring and also be `as an adjustable stop to limit rotation of lthe speed` cup in either direction.

(ltlher'objects and advantagesv will be apparent upon referring tothe specification and accompanying drawing, in which:

Figure 1 is a fragmentary top view of a speedometer with the Aeasing removed, showing `my improved hair spring holder .and

f stop member in connection therewith.

Figure 2 is a front view offthe speedometer with the face plate removed.

Figure 3 isa fragmentary side View of the construction shown in Figure 1.

Figure 4 is a detail view showing my combined hair spring holder "and stop member in perspective. V'

The reference numeral 10 indicates the frame ofa speedometer of the well known A C type, in which a speed cup 12 is caused to rotate by the magnetic a-ction of a rotor which is rotated inside the speed cup in the usual manner. Fastened to the frame by screws '14 is a support 16 in which is journaled the upper end of the speed cup spindle 18. This support has formed in it slots 20. A stamped member 22, shown in Figure 4, has formed on it extensions 24and arms 26 and 28. The arm 26 is bent back upon itself as at 28, and has formed on it a lip 30 in which is provided a hole 32, which extends through both thicknesses of the metal. This stamped member 22 is placed against the underside of the support 16. the extensions 24 fitting into slots 20, and tho ends of the extensions 24 being bent as at ,34 over the upper face of the support 16 to hold the stamped member 22 securely in 'ilace against the support. The arm 26 is ent as; ai; to clear the spindle 18. The

1, was. sensi No 251,172.

and is held therein by means of a pin. 40

which is driven Vinto the opening 32. The purpose lof this than spring 1s, ofcourse, 'to

furnish `the proper lincreasing resistance.

against rotation of `the speed cup 12 so that :the latter will `always indicate the correct speed, :and also to cause the .speed cup to return to `zero position when the vehicle has stopped. ln order to compensate for :manufacturing variations, it is desirable that the tension of thehair spring may be varied order to properly Vcalibratethe mechanism when assembled. ln my construction, this ,can be easily accomplished by bending the arm 26 in either direction., since being made of a stamping it .has sufiicient spring to permit this. y i

The speed cup 12 has `struck up ffrom it lugs 42 andr 44 as shown in Figure 1. The lug 42 strikesagainst one side oi' an arm 28 when the speed Icup is in its zero position. The lug 44 strikes against the opposite side oi' the arm 28 should the speed cup be ro ,ta-.ted to `the other extreme, which would `indicate .the maximum mileagethat `,the instrument is capable of indicating. This would serve to prevent damage tothe instrument which would be apt to take place if the speed cup were permitted to be rotated past this position. In order to adjust the zero position of the speed cup so that the figure 0 will come exactly behind the stationary pointer on the face plate, the arm 28 may be bent in either direction.

It will be seen that I have thus provided Y one simple member which may be easily se cured in place without the use of any screws. rivets or other separate fastening means, and which serves both as an adjustable abut-ment for the hair spring, and also'as an adjustable stop for limiting the rotation of the speed cup. Either the hair spring holding arm or the stop arm may be adjusted independently of the other, Obviously, this is a very inexpensiveconstruction, and at the same time it is very satisfactory.

It is thought that from the foregoing taken in connection with the accompanying drawing' that the construction and operati-on of the device will be apparent to those skilled in the art.y and that Various Changes in size, shape and prolmrtien" and details of con struct-ion may be made without departing from the spirit and scope of the appended claims.

I claim:

l. Speed indicating mechanism comprising a frame.y a support on said frame having a pair of slots therein, a stamped spring holding4 and speed cup movement limiting member provided with a pair of extensions, said extensions tittin; v into said slots and being bent around said support to secure the stamped member to said support.

2. Indicating mechanism comprising a frame, a lapport on said frame having; a pair of slots therein, a stamped member provided with a pair of extensions adapted to t into said slots` and to be bent around said support to secure said member to said support, a rotatable indicating member, and a spring to return said indicating member to zero position7 said stamped member serving as an abutment for one end of said spring and also as stop to limit the rotation ol said indicating' member in either direction.

3. Speed indicating mechanism comprisiner a frame, a support on said l'rame. a speed cup rotatably jonrnalled in said support, a member secured to said support and havinr formed on it two arms, a hair spi-iner having one end secured to said speed cup and the opposite end Secured to one ot' said arms, and lugs formed on Asaid Speed cap and cooperating with the other arm to limit the rotation of said speed enp in either direction.

4. Speed indicating mechanism comprising a frame, a support on said frame, a speed cup rotatably jonrnalled in said support, a

stamped member laeeurcd to Said support. an arm extending out from :raid member. and a hair spring secured at one end to the speed cup and at the opposite end to said arm, the latter being adapted to be bent to vary the tension ot said spring.

5. Speed indicating mechanism comprisin;r a frame. a. support on said frame. a speed cup rotatabtvv journalled in said snpport, a stamped member secured to Said .aupport, an arm extending out l'rom laaid member and lugs formed on said speed eup and cooperating with Iaaid arm to limit the rotation of #aid speed cup in either direction, Said arm beiner adapted to be bent to vary the zero position of said Speed cup.

6. Indicatina' mechanism etanprisinglr a trame, a support on said `trame having` a pair of Slots therein. a latamped member pro vided with a pair of extensione. said extensions fitting; into Said slothl and being bent around said support to secure Said member to laaid Support` a pair of arms formed on said Stamped niembcr`r a rotatable indicating;l member. a spring fiecnred at oney end to Said indicating: member and at the other end to one of said arms, the latter beiner adapted to be bent to var)1 the tension ol' said springl and lugs formed on said indicating,r memd ber and cooperating with the oth arm to limit the rotation of ISaid indicatiimT member in either direction. the last; mentioned arm being' adapted to be bent to vary the Zero position of said indicating` member.

In testimony whereof' I atiix my signature.

JOSEPH ZUBATY. 

